Termikus folyamattechnika

Sealed Forced Convection Chamber Furnaces NA-I and NA-SI

Forced convection chamber furnace NA 120/65 I Forced convection chamber furnace NA 15/65 I as tabletop model with manual gas supply system

Sealed forced convection chamber furnaces are suitable if a heat treatment process up to 650 °C requires a protective gas atmosphere that does not have to be completely oxygen free. The difference between the two variants is that the I-model only has a sealed outer housing while the SI-model has a welded inner box, which further reduces the residual oxygen concentration.

NA-I design 
Like forced convection chamber furnaces < 675 l (page 60) with the following changes

  • Tmax 450 °C and 650 °C
  • Silicone door seal
  • Furnace housing sealed with silicone
  • Protective gas connection in the back wall
  • Defined application within the constraints of the operating instructions
  • Residual oxygen concentration < 1 % depending on the volume and type of protective gas
  • For non-flammable protective and reaction gases such as argon, nitrogen, and forming gas (national regulations must be considered)

NA-SI design 
Additional features

  • Tmax 650 °C
  • Welded inner housing
  • 2-sided heating and air circulation
  • Door sealed with seal gas
  • Sealed connection to circulation motor
  • Gas inlet via circulator shaft
  • Defined application within the constraints of the operating instructions
  • Residual oxygen concentration to 0.1 % depending on the volume and type of protective gas
  • For non-flammable protective and reaction gases such as argon, nitrogen, and forming gas (national regulations must be considered)
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW3connection*in kg
NA 30/45 I45029042026030104012901385 3.01(3)-phase285
NA 60/45 I45035050035060110013701475 6.03-phase350
NA 120/45 I450450600450120125015501550 9.03-phase460
NA 250/45 I450600750600250135016501725 12.03-phase590
NA 500/45 I4507501000750500155019001820 18.03-phase750
NA 675/45 I4507501200750675155021001820 24.03-phase900
            
NA 15/65 I1650295340170154707904602.81-phase60
NA 30/65 I65029042026030870129013855.03-phase2285
N A 60/65 I (SI)65035050035060910139014759.03-phase350
NA 120/65 I (SI)6504506004501209901470155012.03-phase460
NA 250/65 I (SI)65060075060025011701650168020.03-phase590
NA 500/65 I (SI)650750100075050012901890182527.03-phase750
NA 675/65 I650750120075067512902100182527.03-phase900
1Table-top model*Please see page 89 for more information about supply voltage
2Heating only between two phases 3Depending on furnace design connected load might be higher